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Traefik backend down
critical

Description All Traefik backends are down
Query 
>>>
	
				
					
					
						count
					
				
			
				
					(
				
			
				
					
				
			
				
					) by (backend) == 0
Query Explanation

The query counts the number of traefik_backend_server_up series for each backend; when this count is 0 it means no server for that backend is reporting as up, so the alert fires for any backend with no healthy upstream servers.

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